| Margaret Heaphy's efforts: | From | Age | Date | Finish Time |
|---|---|---|---|---|
| Hardrock 100 2010 | Montana, US | 54 | Friday, July 9, 2010 | 47:12:37.00 |
| Hardrock 100 2009 | Montana, US | 53 | Friday, July 10, 2009 | 47:56:34.00 |
| Hardrock 100 2008 | Montana, US | 53 | Friday, July 11, 2008 | DNF |
| Hardrock 100 2007 | Montana, US | 52 | Friday, July 13, 2007 | 46:56:35.00 |
| Hardrock 100 2006 | Montana, US | 51 | Friday, July 14, 2006 | DNF |
| Hardrock 100 2005 | Montana, US | 50 | Friday, July 8, 2005 | 46:43:42.00 |
| Hardrock 100 2004 | Montana, US | 49 | Friday, July 9, 2004 | 47:54:13.00 |
| Hardrock 100 2003 | Montana, US | 48 | Friday, July 11, 2003 | 47:21:29.00 |
| Hardrock 100 2001 | Montana, US | 46 | Friday, July 13, 2001 | 45:33:29.00 |
| Hardrock 100 2000 | 45 | Friday, July 7, 2000 | 45:29:15.00 | |
| Hardrock 100 1999 | Montana, US | 43 | Friday, July 9, 1999 | DNF |
| Hardrock 100 1997 | Montana, US | 41 | Friday, July 11, 1997 | DNF |
| Hardrock 100 1994 | Colorado, US | 38 | Friday, July 8, 1994 | 38:43:00.00 |
| Hardrock 100 1993 | Montana, US | 37 | Friday, July 9, 1993 | 41:38:00.00 |